Chapter 52. Co-Dispersion of Mullite and Wollastonite in Aqueous Suspensions
- John B. Wachtman Jr.
Published Online: 26 MAR 2008
Copyright © 1992 The American Ceramics Society
Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 9/10
How to Cite
Bryden, R., Konsztowicz, K. J., Calcy, W. F. and Kingston, P. W. (1994) Co-Dispersion of Mullite and Wollastonite in Aqueous Suspensions, in Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470313978.ch52
- Published Online: 26 MAR 2008
- Published Print: 1 JAN 1994
Print ISBN: 9780470375198
Online ISBN: 9780470313978
- thermal expansion coefficient
The study of co-dispersion of mullite matrix powder and wollastonitc particles in aqueous suspensions was performed at various pH values. The optimum conditions for wet-processing were determined by combining the viscosity measuremcnts with SEM observations of powders deposited on microfilters. This latter procedure was applied to visually confirm the state of dispersion/flocculation of powder mixtures at pH values most interesting from the processing point of view. It was found that the minimum viscosity for wollastonite/mullite composite mixtures in aqueous suspensions occured at pH 11.6. At higher solid content (60 wt%) these slurries were shear-thinning, which indicated their tendency to flocculate.